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(No Model D; S. RICHARDSON HEATING' DRUM. v No. 282,567. Patented Aug. 7, 1883,

WITNESES Nv FEYERS. nww-uma n w, Wa-shingon. n.c.

DYVIGH'I S. RICHARDSON, OF BROOKLYN, NEIV YORK.

HEATING-DRUM.

SPECIFICATION forming part of Letters Patent No. 282,567, dated August 7, 1883.

Application filed Api-iliZO, 1883. (Noinodch) I To all whom it may concern.-

Be it known that I, DWIGHT S. RICHARD- soN, of Brooklyn, in the county of Kings and Stateof New York, have invented certain new and useful Improvements in Heating-Drums, of which the following is a full, clear, and exact description.

The object of the invention is the production of a drum which, while capable of retaining and circulating the products of combustion for a sufficient length of time to thoroughly extract for utilization the heat contained in them, shall also be so constructed that all its flues shall be readily accessible for the dislodgment and removal of accumulations of soot and ashes. 7

In the accompanying drawings, forming a part of this specification, Figure 1 is a horizontal section, and Fig. 2 is a central vertical section, of a drum embodying my invention.

A designates the drum, A being the top plate, A the bottom plate, and A the outer annular wall, of the same. A is a segment of a ring, the opening between its ends being placed at a point opposite the exitopening of the drum. A is a smaller segment, the space between its ends being opposite to the space in the segment A. A is another segment, placed within the segment A, and having a corresponding interval between its ends. A A are vertical walls connecting the sections A and A.

At a point opposite the exit-opening is an orifice, a, in the outer casing, A, for access to the interior of the drum, and this orifice is provided with a collar, a, attached thereto in any suitable manner for receiving a removable closing-cap, b. A similar collar, (0*, is fitted to the exit-opening a for attachment of an exit-pipe, I).

If desired, an opening for direct exit may be provided in the segment A at a point between the vertical central flue and the exitopening a and this opening will be provided with a suitable damper for controlling the same.

In the top plate and in the bottom plate, between the vertical segmental plates A and A and their connecting-plates A A are orifices (one or more) for the admission of air. As a means of connection and support, the lower plate, and, if desired, the upper plate also, is

provided with webs I), connecting the walls of the two segmental sections A and A.

Thus constructed, the drum is placed by its centralopening, 0, formed in the plate A over the collar 00 of a furnace or stove, X, which may be of any desired construction, and the operation will be as follows: The products of combustion rising from the combustion-chamber below into the central flue-chamber, O, of the drum pass by the short flue O to the concentric flue O". Reaching this, they are deflected by the section A, which forms the outer wall of this flue, and, dividing, pass to the front, where they are again deflected by the annular wall A and the cap b, and ale. compelled to pass once more toward the rear, where they find escape by the exit-flue, all as indicated by the unfeathered arrows. Air rising from below passes into the space B, be-

I tween the central rising flue or chamber, 0,

and the segment A", and being then subjected to the action of heated interior and exterior surfaces is discharged above, as indicated by arrows in dotted lines.

Heating-drums composed of a series of segments of circles have before been made, and in some of these an air-heating passage has been embraced between smoke-flues. It is not understood, however, that in any of these are the flues so constructed and arranged that ready access can be had to all parts of all of them. This objection-a most serious one in the practical use of these appliances-it has been my effort to overcome; and it will be observed that while under my construction the outer fine, 0, is accessible in all its parts, on removal of the escape-pipe Z), not only that flue, but also the intermediate fine, 0', may be reached and effectually cleared of all deposits of soot and ashes on the removal of the cap I).

The short flue (1 may be reached through the door at of the combustioirchamber, and when the damper is opened 'provided in the segmental wall A" all the fines may be reached through the exit-opening.

The invention having been thus described, I claim and desire to secure by Letters Patent of the United States 1. A heating-drum having a central inletopening, two concentric flues, an exit-open ing, and an orifice through which both the concentric flues may be reached for clearing.

2. A heating-drum having two concentric smoke-fines independent of the inlet-flue and the outlet-flue, and a clearing-orifice through which both the concentric fines are accessible.

3. A heating-drum having two concentric fiues, the inner flue receiving the products of combustion through an orifice in its inner wall and discharging them through an orifice in its outer wall, and the outer flue, receiving the products of combustion through an orifice in its inner wall on that side of the drum which is most remote from the exit-opening, and discharging them through an orifice in its outer wall, and an orifice through which the concentric flues are accessible.

4. The combination of a central rising smokefiue, an air-flue encircling the central flue, eX- cept at the point of exit therefrom, a smokeflue encircling the air-flue, and a third smoke flue encircling the latter flue and separated therefrom by a single partition only.

5. The combination of the flue 0 and the fiue'C',, connected therewith and contiguous thereto, and the clearing orifice, through which access to both the horizontal smokeflues is afiorded.

6. The combination of two contiguous circular or segmental smoke-fines, communicating, as described, an exit-opening at one side of the same, and a clearing-orifice at the opposite side.

7. The combination of the flue-chamber G, the flue C the flue G the flue C", contiguous to the flue C, as described, and the ,clearingorifice a.

8. The combination of the flue-chamber C, the flue O, the flue C the flue C, separated from the flue O by a single partition only, and

the air-passage B betwcen'the central flue or chamber 0 and the flue C".

9. The combination of the rising-flue O, the flue 0 the flue C, the flue 0*, contiguous to the flue 0", an orifice in the segmental partition at a point between the risingflue and the exit-opening, and a damper adapted to open or close such orifice.

10. The combination of the rising-flue O, the fluc G the flue O, the flue O, contiguous to the flue 0 an orifice in the segmental partition at a point between the risingflue and the exit-opening, a damper adapted to close such orifice, and a clearing-opening in the outer wall of the flue C.

11. The combination of the flue-chamber C, the flue C the flue Q, the flue O, the front clearing-opening, a, and the rear clearingopening, a

12. The combination of the rising-flue chamber G, the flue C the flue C, the flue C, the front clearing opening, a, the cleari ng-openin g (1?, and the air-passage B.

DWIGHT S. RICHARDSON.

\Vitnesses: HENRY T. RICHARDSON, JAMES B. TAYLOR. 

